US5605208A - Rotary damper - Google Patents

Rotary damper Download PDF

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Publication number
US5605208A
US5605208A US08/587,778 US58777895A US5605208A US 5605208 A US5605208 A US 5605208A US 58777895 A US58777895 A US 58777895A US 5605208 A US5605208 A US 5605208A
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US
United States
Prior art keywords
housing
rotor
damper
annular
disposed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/587,778
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English (en)
Inventor
Bernd Friedrichsen
Werner Janoschek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ITW Ateco GmbH
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ITW Ateco GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ITW Ateco GmbH filed Critical ITW Ateco GmbH
Application granted granted Critical
Publication of US5605208A publication Critical patent/US5605208A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/02—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together
    • F16F7/04—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together in the direction of the axis of rotation
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/21—Brakes
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/252—Type of friction
    • E05Y2201/254—Fluid or viscous friction
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/262—Type of motion, e.g. braking
    • E05Y2201/266—Type of motion, e.g. braking rotary

Definitions

  • the invention relates generally to damper mechanisms, and more particularly to a rotary damper which is operatively associated with spring-biased components.
  • any parts pretensioned by springs for instance inside a motorcar, with a suitable damping means.
  • This concerns lids of glove compartments or ashtrays, or supporting straps or the like.
  • any flaps, lids or drawers are pretensioned by springs in the opening direction.
  • Supporting straps are pretensioned into the position of rest.
  • Any appropriate damping means thus ensures that the movement of the parts caused by a spring takes place in a damped manner. It has become known to use so-called oil dampers for damping means of that kind.
  • oil dampers are rotary dampers, with at least one disc-shaped rotor being supported within an area of a housing which is filled with a suitable fluid damping medium, such as silicone oil. Due to the relatively high viscosity of the damping medium, the attempt to rotate the rotor results in the generation of a countermoment or resistance which may be used for damping purposes.
  • a pinion is arranged on the axis of the rotor which pinion coacts with a line-shaped toothed segment which is secured to the element to be damped.
  • Rotary dampers of this kind can be constructed so as to have a very small size and they function most efficiently. However, they also have certain disadvantages. Depositing the liquid damping medium into the housings of the dampers involves a relatively high expense. The damping fluid naturally must be retained in the housing so that the latter needs to be provided with corresponding seals. This is why the damper will be relatively expensive as well. Moreover, the damping fluid naturally is temperature-dependent. Different temperatures result in a different volume. In the DE 33 20 069 publication, it is therefore also suggested to arrange within the damping area a flexible membrane which gives way in case of an increase in volume of the damping medium in order to increase the volume for accomodations the damping fluid. Any variations of temperature, however, also result in different viscosities and, consequently, a different torque.
  • the structure of the inventive rotary damper is relatively similar to that of the so-called oil dampers. Damping according to the invention, however, does not make use of the viscosity of a liquid medium but is a function of the friction of the rotor developed in connection with a frictional surface of the housing.
  • the rotor is supported in the housing so as to be allowed a limited axial displacement and is pressed against the frictioned surface of the housing with the aid of a spring.
  • the desired damping moment is generated by choosing a suitable material for the friction surfaces.
  • the rotary damper according to the invention comprises numerous advantages. Special sealing measures on the housing or on the rotor axis are not necessary. Filling the housing with a damping medium is also not required, as a result of which the production of the inventive rotary damper involves substantially less expense.
  • the inventive rotary damper is also relatively independent of temperature and, in spite of the different ambient temperature, generates an approximately constant braking moment.
  • the inventive rotary damper can also be provided with different braking moments in case of any given configuration and size.
  • the braking moment can be specifically adjusted to desired values by choosing another spring, by changing the thickness of the rotor, by choosing another material having another coefficient of friction or by changing the sizes of the friction surfaces.
  • the friction surface of the housing may be formed of the housing material itself.
  • the friction surface of the housing is defined by a separate disc-shaped member of a suitable frictions material which, for instance, is silicone or a comparable elastomeric material. To prevent the friction disc from rotating as well, it can be secured to the housing so as to ensure the necessary disposition.
  • a cup-shaped spring may be provided as a spring member acting upon the rotor, which spring, according to a further development of the invention, is corrugated in the circumferential direction.
  • Cup-shaped springs of that kind are known per se.
  • the radially inner side portion of the spring engages the rotor, while the radially outer side portion is supported by the wall of the housing.
  • the wall of the housing is defined by a lid which positively engages a groove of the housing. In this way, the wall of the housing or the lid is prevented from being more or less deformed outwardly as a result of the axial pressure of the spring.
  • the housing is pot-shaped and, as mentioned, can be closed by a lid, with a shaft portion of the rotor extending through a central bore of the lid.
  • the lid may be provided with a radial extension which is positively received by within an inner annular groove of the housing. During assembly the lid is simply pressed into the pot-shaped housing, with the housing or the lid getting slightly deformed temporarily, until the radial extension engages the groove.
  • a construction of that kind also allows the rotary damper to be easily disassembled.
  • a supporting trunnion which is molded upon the wall of the housing including the friction surface, which supporting trunnion engages a central bearing recess of the rotor.
  • the bearing recess must be deep enough to allow axial movement of the rotor.
  • FIG. 1 is a side view of a rotary damper according to the invention.
  • FIG. 2 is a section through the damper according to FIG. 1 along line 2-2.
  • FIGS. 1 and 2 show a housing 10 of a rotary damper which comprises a pot-shaped portion 12 including flat projections 14, 16 at opposite sides thereof, which projections are provided with apertures 18, 20 for securing them to a base.
  • the open side of the pot-shaped portion 12 can be closed by a lid 22 which comprises a circumferentially extending annular extension 24 which engages a correspondingly formed annular groove 26 of the housing portion 12.
  • a disc-shaped rotor 28 is arranged, on which a shaft portion 30 is molded which with a smaller diameter portion extends through a central bore of the lid 22.
  • a pinion 32 is provided which coacts with a corresponding tooth portion of a movable element, such as a trunk lid, an ashtray or the like.
  • the rotor 28 is supported by the lid 22 by means of a shoulder 34. On the opposite side the rotor 28 is supported by a friction surface 36 which engages the associated wall of the housing and can be secured to the latter in a suitable way.
  • a cup spring 38 is matingly accommodated within a recess 40 of the lid 22 so as to be supported by the rotor 28 and the lid 22. Support of the cup spring 38 by the lid 22 is made with its radially outer circumference, while the radially inner circumference engages the rotor 28 so that only relatively low friction is caused when moving the rotor disc 28.
  • the rotor disc 28 can move in the axial direction, possibly with minimum clearance, but is permanenty pressed against the friction surface 36 by means of the spring 38.
  • the frictional surface 36 is composed of a suitable frictional material, such as silicone rubber or the like.
  • Rotary movement of the rotor 28 thus causes a braking moment of a given value.
  • the braking moment naturally may be varied by the tension of the spring 38, by the selection of a corresponding material having another coefficient of friction or the like without having to change the fundamental structure of the rotary damper described above.
  • the illustrated parts of the rotary damper, except the spring 38, may be made of a suitable synthetic material, for instance by injection molding.
  • the disc 36 may be omitted in case the material of the housing 10 has corresponding frictional properties. The friction thus takes place between the rotor 28 and the wall of the housing facing the rotor.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)
  • Fluid-Damping Devices (AREA)
  • Passenger Equipment (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
US08/587,778 1994-12-23 1995-12-26 Rotary damper Expired - Lifetime US5605208A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9420646U 1994-12-23
DE9420646U DE9420646U1 (de) 1994-12-23 1994-12-23 Rotationsdämpfer

Publications (1)

Publication Number Publication Date
US5605208A true US5605208A (en) 1997-02-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US08/587,778 Expired - Lifetime US5605208A (en) 1994-12-23 1995-12-26 Rotary damper

Country Status (8)

Country Link
US (1) US5605208A (enrdf_load_stackoverflow)
JP (1) JPH08233011A (enrdf_load_stackoverflow)
KR (1) KR960023902A (enrdf_load_stackoverflow)
BR (1) BR9505354A (enrdf_load_stackoverflow)
DE (1) DE9420646U1 (enrdf_load_stackoverflow)
FR (1) FR2728640A1 (enrdf_load_stackoverflow)
GB (1) GB2296545A (enrdf_load_stackoverflow)
IT (1) IT1281393B1 (enrdf_load_stackoverflow)

Cited By (44)

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US5730062A (en) * 1995-04-05 1998-03-24 Abb Henschel Aktiengesellschaft Device for connecting rail vehicles
US5865278A (en) * 1996-03-25 1999-02-02 Trw United-Carr Gmbh & Co. Kg Rotation damper
US6119824A (en) * 1998-05-29 2000-09-19 Mccallum; Dennis L. Braked mechanical joint assembly
US6129186A (en) * 1998-04-03 2000-10-10 Trw Inc. Rotational damper
US6295883B1 (en) * 1998-10-19 2001-10-02 Kejima Press Industry Co., Ltd. Opening and closing type interior device
US6390255B2 (en) * 2000-07-19 2002-05-21 Tok Bearing Co., Ltd. Rotary damper
FR2837891A1 (fr) * 2002-03-27 2003-10-03 Nicolas Stephane Goguet Ralentisseur rotatif
GB2404962A (en) * 2003-08-13 2005-02-16 Ford Global Tech Llc Damper arrangement for damping the movement of a lid or the like
US20050179184A1 (en) * 2001-02-14 2005-08-18 Oiles Corporation Damper and automobile seat having the damper
US20070108141A1 (en) * 2005-05-05 2007-05-17 Dixie Consumer Products Llc Dispenser for disposable cutlery and components therefor
CN100348887C (zh) * 2004-12-03 2007-11-14 西北工业大学 一种抑制带弹性支承转子系统振动的方法及装置
US20080121650A1 (en) * 2006-11-07 2008-05-29 Dixie Consumer Products Llc Cutlery Dispenser and Method of Dispensing Cutlery
US20100170915A1 (en) * 2009-01-06 2010-07-08 Dixie Consumer Products Llc Cutlery utensil dispensing apparatus and method
US20110048878A1 (en) * 2004-03-31 2011-03-03 Kabushiki Kaisha Somic Ishikawa Rotary Damper
US20110226797A1 (en) * 2010-03-19 2011-09-22 Dixie Consumer Products Llc Cutlery Utensil Dispenser
US20110233012A1 (en) * 2008-09-22 2011-09-29 Ejot Gmbh & Co. Kg Rotational movement damper
US8210364B2 (en) 2005-05-05 2012-07-03 Dixie Consumer Products Llc Dispenser for disposable cutlery and components therefor
CN102534886A (zh) * 2012-01-22 2012-07-04 经纬纺织机械股份有限公司 解决环锭细纱机后罗拉扭震的阻尼装置
US8360273B2 (en) 2008-10-08 2013-01-29 Dixie Consumer Products Llc Cutlery utensil dispenser
US8701932B2 (en) 2008-10-08 2014-04-22 Dixie Consumer Products Llc Cutlery dispenser trays
US8776379B2 (en) 2010-08-24 2014-07-15 Dixie Consumer Products Llc Removable strip for packaging cutlery and related methods
US8839522B2 (en) 2010-08-12 2014-09-23 Dixie Consumer Products Llc Interlocking cutlery and related methods
US9132751B2 (en) 2012-07-26 2015-09-15 Leggett & Platt Canada Co. Remote damping system
US9237815B2 (en) 2006-11-07 2016-01-19 Dixie Consumer Products Llc Cutlery dispenser and method of dispensing cutlery
US9266646B2 (en) 2012-09-07 2016-02-23 Dixie Consumer Products Llc Cutlery utensil dispensing package
CN105526304A (zh) * 2015-12-02 2016-04-27 西北工业大学 一种智能结构弹支干摩擦阻尼器
US9332861B2 (en) 2013-08-19 2016-05-10 Dixie Consumer Products Llc Cutlery dispenser and methods of use
US9345340B2 (en) 2010-12-10 2016-05-24 Dixie Consumer Products Llc Dispensing mechanism for utensil dispenser and related methods
US20160208874A1 (en) * 2015-01-21 2016-07-21 Trw Automotive Electronics And Components Gmbh Brake assembly and friction lining for a brake assembly
US20160208880A1 (en) * 2013-08-28 2016-07-21 Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt Brake system for slowing down a flap of a motor vehicle
US9435154B2 (en) * 2014-11-05 2016-09-06 Chin-Fu Chen Blind body positioning mechanism for non pull cord window blind and window blind using the same
US9439518B2 (en) 2011-08-19 2016-09-13 Dixie Consumer Products Llc Cutlery dispenser
US9560920B2 (en) 2014-04-11 2017-02-07 Dixie Consumer Products Llc Forward advancing cutlery dispenser
US9693640B2 (en) 2013-08-08 2017-07-04 Dixie Consumer Products Llc Front loading cutlery dispenser
US20170252251A1 (en) * 2016-03-02 2017-09-07 Water Pik, Inc. Actuation assembly for an oral irrigator
US9924816B2 (en) 2010-06-08 2018-03-27 Gpcp Ip Holdings Llc System and method for holding cutlery together
US9943176B2 (en) 2013-07-25 2018-04-17 Gpcp Ip Holdings Llc Cutlery dispenser and related methods
US10220997B2 (en) 2013-07-25 2019-03-05 Gpcp Ip Holdings Llc Cutlery dispenser and related methods
US10238215B2 (en) 2012-09-20 2019-03-26 Steelcase Inc. Seating arrangement with headrest assembly
US10558109B2 (en) * 2011-02-11 2020-02-11 Vitec Videocom GmbH Tripod head
US10595647B2 (en) 2010-12-14 2020-03-24 Gpcp Ip Holdings Llc Belt drive for dispensing cutlery and related methods
US10822851B2 (en) 2018-12-02 2020-11-03 Weber Knapp Company Cover assembly with lid assist assembly and friction bearing
CN112081851A (zh) * 2020-09-21 2020-12-15 广州大学 一种变阻尼速度型阻尼器
US10898010B2 (en) 2010-12-10 2021-01-26 Gpcp Ip Holdings Llc Screw drive for dispensing cutlery and related methods

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US5660254A (en) * 1995-12-04 1997-08-26 Illinois Tool Works Inc. Dry rotary damper
DE19819767A1 (de) * 1998-05-04 1999-11-11 Schlafhorst & Co W Dämpfungseinrichtung für einen berührungslos gelagerten Rotor
JP4197944B2 (ja) 2000-10-26 2008-12-17 株式会社パイオラックス 回転式ダンパー
JP4562367B2 (ja) * 2002-11-22 2010-10-13 トックベアリング株式会社 回転ダンパ
DE102005043988A1 (de) * 2005-09-14 2007-03-22 Huf Hülsbeck & Fürst Gmbh & Co. Kg Dämpferelement
CN109611509B (zh) * 2018-12-07 2020-09-11 中国航空工业集团公司洛阳电光设备研究所 一种适用于小空间的阻尼可调旋转机构

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US916528A (en) * 1906-02-19 1909-03-30 Lewis H Broome Friction device.
US1128782A (en) * 1906-12-26 1915-02-16 Edward V Hartford Spring-retarding device.
US1121012A (en) * 1909-12-22 1914-12-15 Edward V Hartford Spring-controller for vehicles.
US1088450A (en) * 1913-05-29 1914-02-24 Ithiel C Richards Shock-absorber.
US1177876A (en) * 1913-11-22 1916-04-04 Charles Laporte Shock-absorber.
US1499179A (en) * 1923-05-09 1924-06-24 Mastrangel Louis Shock absorber
US1515716A (en) * 1924-06-30 1924-11-18 Adams Motors Corp Suspension for automobiles
US1685497A (en) * 1924-10-27 1928-09-25 George C Martin Shock absorber
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ITTO950978A1 (it) 1997-06-07
GB2296545A (en) 1996-07-03
KR960023902A (ko) 1996-07-20
IT1281393B1 (it) 1998-02-18
FR2728640A1 (fr) 1996-06-28
DE9420646U1 (de) 1995-02-16
BR9505354A (pt) 1997-10-28
JPH08233011A (ja) 1996-09-10
GB9525371D0 (en) 1996-02-14
ITTO950978A0 (enrdf_load_stackoverflow) 1995-12-07

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